SanFran 13 Posted January 11, 2023 Share Posted January 11, 2023 I'm thinking of inserting a polycarb sheet into old wooden fwd hatch. Rebate into existing ply maybe. Has anyone ever tried this before? Pros and cons? Hatch is quite large, over 600mm square. Im thinking possibly one (or more) inserts. Obviously want to maintain the strength for a 100kg plus force load on top of it. And avoid it being too slippy in the wet. Quote Link to post Share on other sites
aardvarkash10 1,056 Posted January 11, 2023 Share Posted January 11, 2023 I haven't done it, but don't see any issues with it. Treat it like any other window in the hull or cabin top - rebate, the right adhesive and the right plastic - ie, UV stable etc. Radius the corners to reduce the risk of cracking. Quote Link to post Share on other sites
marinheiro 359 Posted January 12, 2023 Share Posted January 12, 2023 cut the holes oversize with rebate and install/glue solid timber (kauri or the like) "picture frames" with the actual rebates for the windows. You want to remove any chance of water getting into the plywood's end grain 1 Quote Link to post Share on other sites
Frank 157 Posted January 13, 2023 Share Posted January 13, 2023 Agree with all comments above, and make sure the ply end grain is epoxy sealed Quote Link to post Share on other sites
LBD 160 Posted January 14, 2023 Share Posted January 14, 2023 What is the aim... to improve light below or to see out of? A photo of the hatch would be good so we get a good idea of what you want to do... Why not replace all the ply with a heavy poly carb sheet? Would always be slippery when wet, but you may could put a timber grid over top for strength as well as traction... In any case leave the poly fractionally raised so that water does not pool on top of the poly Quote Link to post Share on other sites
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